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Newton’s Laws Of Motion

Videos

1. Newton’s 1st Law I

2. Newton’s 1st Law II

3. Newton’s 2nd Law

4. Newton’s 3rd Law

5. Application of Newton’s Law I

As a continuation of our efforts to understand Newton's laws, we shall consider
some specific cases from real life. With what force does a jet of water strike a
wall? How does a helicopter hover? From which law does it follow that the weight
of a block resting on a table is equal to the normal force? What are force of tension
and spring force? How can a horse pull a cart fastened to itself? The video lecture
“Applications of Newton's Laws” answers some of these questions, and
more.

6. Application of Newton’s Law II

7. Concept of Force

8. Free Body Diagram

Once you have learnt Newton's second and third laws of motion, the next challenge
is to apply them successfully. A system of bodies is usually comprised of a number
of bodies. Each body is acted upon by one or more forces, exerted by other bodies
inside or outside the system. How do we identify the forces acting on a particular
body? How do we draw a separate diagram showing the forces acting on the body alone?
How do we choose a convenient coordinate system? How do we write the equations of
motion and solve them? The video lecture “Free Body Diagrams” answers
some of these questions, and more.

9. Study of Wedge-block system by Pseudo-Force Method

10. Problems on Pulley and Wedge-Block System

11. Constrained Motion of Wedge-Block System

12. Constrained Motion of Pulley-Block System

13. Problems on Application of Newton’s Law I

14. Problems on Application of Newton’s Law II

15. Comparison of Inertial Frame and Non-Inertial Frame Methods

16. Problems on Pulley and Wedge-Block System II

17. Pseudo Force

Newton's laws are not valid in a non-inertial frame of reference, which accelerates
with respect to the ground. However, we may still write equations of motion of a
body in a non-inertial frame by introducing the concept of pseudo force. How does
a pseudo force differ from a real force? Why does a passenger feel heavier when
a lift accelerates upwards? Why does a suspended doll tilt forwards when a car decelerates?
The video lecture “Pseudo Force and Its Examples” answers some of these
questions, and more.